[Porsche 935]

Temp here is in 80's. Yes did charge by weight. Compressor was running. When I replaced the dryer, if you revved the motor pressures would go above 300 so I evacuated the system, replaced the dryer, and pulled a vacuum for an hour and charged system. Pressures were good and a/c blowing ice cold. Has run less than an hour the whole summer. Just turned it on this weekend while programming new engine management for idle and you could feel a hint of cold air when revved but nothing at idle. The dryer or expansion valve are frequent issues on these cars. Expansion valve is supposed to be a bear to replace.